/**
 * Copyright (C) 2012 João Francisco Biondo Trinca
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without restriction,
 * including without limitation the rights to use, copy, modify, merge,
 * publish, distribute, sublicense, and/or sell copies of the Software,
 * and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 *
 * @author     João Francisco Biondo Trinca <wolfulus@gmail.com>
 * @copyright  2012 João Francisco Biondo Trinca <wolfulus@gmail.com>
 * @license    http://www.opensource.org/licenses/mit-license.html  MIT License
 *
 */

/**
 * NetBuffer classes
 */
var Buffer = require('buffer').Buffer;

/**
 * Class constructor
 */
function NetWriter() {

    // Stores the buffer contents
    this.content = [];

    // Stores the current buffer size
    this.size = 0;

}
/**
 * Writes a char to the buffer
 * @param value Char value
 */
NetWriter.prototype.writeInt8 = function (value) {
    var buffer = new Buffer(1);
    buffer.writeInt8(value, 0, true);
    this.content.push(buffer);
    this.size += 1;
};

/**
 * Writes a byte to the buffer
 * @param value Byte value
 */
NetWriter.prototype.writeUInt8 = function (value) {
    var buffer = new Buffer(1);
    buffer.writeUInt8(value, 0, true);
    this.content.push(buffer);
    this.size += 1;
};

/**
 * Writes a short to the buffer
 * @param value Short value
 */
NetWriter.prototype.writeInt16 = function (value) {
    this.writeInt16BE(value);
};

/**
 * Writes a short to the buffer
 * @param value Short value
 */
NetWriter.prototype.writeInt16BE = function (value) {
    var buffer = new Buffer(2);
    buffer.writeInt16BE(value, 0, true);
    this.content.push(buffer);
    this.size += 2;
};

/**
 * Writes a short to the buffer
 * @param value Short value
 */
NetWriter.prototype.writeInt16LE = function (value) {
    var buffer = new Buffer(2);
    buffer.writeInt16LE(value, 0, true);
    this.content.push(buffer);
    this.size += 2;
};

/**
 * Writes a short to the buffer
 * @param value Short value
 */
NetWriter.prototype.writeUInt16 = function (value) {
    this.writeUInt16BE(value);
};

/**
 * Writes a short to the buffer
 * @param value Short value
 */
NetWriter.prototype.writeUInt16BE = function (value) {
    var buffer = new Buffer(2);
    buffer.writeUInt16BE(value, 0, true);
    this.content.push(buffer);
    this.size += 2;
};

/**
 * Writes a short to the buffer
 * @param value Short value
 */
NetWriter.prototype.writeUInt16LE = function (value) {
    var buffer = new Buffer(2);
    buffer.writeUInt16LE(value, 0, true);
    this.content.push(buffer);
    this.size += 2;
};

/**
 * Writes an integer to the buffer
 * @param value Integer value
 */
NetWriter.prototype.writeInt32 = function (value) {
    this.writeInt32BE(value);
};

/**
 * Writes an integer to the buffer
 * @param value Integer value
 */
NetWriter.prototype.writeInt32BE = function (value) {
    var buffer = new Buffer(4);
    buffer.writeInt32BE(value, 0, true);
    this.content.push(buffer);
    this.size += 4;
};

/**
 * Writes an integer to the buffer
 * @param value Integer value
 */
NetWriter.prototype.writeInt32LE = function (value) {
    var buffer = new Buffer(4);
    buffer.writeInt32LE(value, 0, true);
    this.content.push(buffer);
    this.size += 4;
};

/**
 * Writes an integer to the buffer
 * @param value Integer value
 */
NetWriter.prototype.writeUInt32 = function (value) {
    this.writeUInt32BE(value);
};

/**
 * Writes an integer to the buffer
 * @param value Integer value
 */
NetWriter.prototype.writeUInt32BE = function (value) {
    var buffer = new Buffer(4);
    buffer.writeUInt32BE(value, 0, true);
    this.content.push(buffer);
    this.size += 4;
};

/**
 * Writes an integer to the buffer
 * @param value Integer value
 */
NetWriter.prototype.writeUInt32LE = function (value) {
    var buffer = new Buffer(4);
    buffer.writeUInt32LE(value, 0, true);
    this.content.push(buffer);
    this.size += 4;
};

/**
 * Writes a float to the buffer
 * @param value Float value
 */
NetWriter.prototype.writeFloat = function (value) {
    this.writeFloatBE(value);
};

/**
 * Writes a float to the buffer
 * @param value Float value
 */
NetWriter.prototype.writeFloatBE = function (value) {
    var buffer = new Buffer(4);
    buffer.writeFloatBE(value, 0, true);
    this.content.push(buffer);
    this.size += 4;
};

/**
 * Writes a float to the buffer
 * @param value Float value
 */
NetWriter.prototype.writeFloatLE = function (value) {
    var buffer = new Buffer(4);
    buffer.writeFloatLE(value, 0, true);
    this.content.push(buffer);
    this.size += 4;
};

/**
 * Writes a float to the buffer
 * @param value Double value
 */
NetWriter.prototype.writeDouble = function (value) {
    this.writeDoubleBE(value);
};

/**
 * Writes a double to the buffer
 * @param value Double value
 */
NetWriter.prototype.writeDoubleBE = function (value) {
    var buffer = new Buffer(8);
    buffer.writeDoubleBE(value, 0, true);
    this.content.push(buffer);
    this.size += 8;
};

/**
 * Writes a double to the buffer
 * @param value Double value
 */
NetWriter.prototype.writeDoubleLE = function (value) {
    var buffer = new Buffer(8);
    buffer.writeDoubleLE(value, 0, true);
    this.content.push(buffer);
    this.size += 8;
};

/**
 * Writes a null-terminated string to the buffer
 * @param value String value
 */
NetWriter.prototype.writeNtString = function (value) {
    var buffer = new Buffer(value.length + 1);
    for (var pos = 0, len = value.length; pos < len; pos++) {
        buffer[pos] = value.charCodeAt(pos);
    }
    buffer[value.length] = 0;
    this.content.push(buffer);
    this.size += value.length + 1;
};

/**
 * Writes a null-terminated string to the buffer
 * @param value String value
 */
NetWriter.prototype.writeString = function (value) {
    var buffer = new Buffer(value.length);
    for (var pos = 0, len = value.length; pos < len; pos++) {
        var val = value.charCodeAt(pos);
        buffer[pos] = val;
        if (!val) {
            break;
        }
    }
    this.content.push(buffer);
    this.size += value.length + 1;
};

/**
 * Writes a fixed-length string to the buffer (filled with zeros)
 * @param value String value
 * @param maxlength Maximum length of the string
 */
NetWriter.prototype.writeFixedString = function (value, maxlength) {
    var len = value.length;
    var buffer = new Buffer(maxlength);
    for (var pos = 0; pos < maxlength; pos++) {
        if (pos < len) {
            buffer[pos] = value.charCodeAt(pos);
        } else {
            buffer[pos] = 0;
        }
    }
    this.content.push(buffer);
    this.size += maxlength;
};


/**
 * Writes a buffer
 * @param buffer Buffer contents
 */
NetWriter.prototype.writeBuffer = function (buffer) {
    this.content.push(buffer);
    this.size += buffer.length;
};

/**
 * Converts the current buffer collection to the final Node.js's Buffer class.
 */
NetWriter.prototype.toBuffer = function () {
    var offset = 0;
    var count = this.content.length;
    var buffer = new Buffer(this.size);
    for (var i = 0; i < count; i++) {
        this.content[i].copy(buffer, offset);
        offset += this.content[i].length;
    }
    return buffer;
};

/**
 * Class export
 */
exports.NetWriter = NetWriter;